AJS Model 14 250

Technical SpecificationsType: Single-cylinder, Overhead Valve (OHV).Displacement: 248cc (often rounded from 248.5cc).Bore x Stroke: 69.85 mm x 64.84 mm (Over-square design).Compression Ratio: 7.8:1 (Increased in later CSR models).Power Output: Approximately 17 HP @ 7,250 rpm (CSR variant).Transmission: 4-speed manual gearbox.Fuel System: Amal Monobloc carburetor. Key Design FeaturesUnit-Construction Appearance: Side castings were used to hide the gearbox and primary drive, giving it a modern "unit" look, though the components remained separate.Désaxé Cylinder: The cylinder centre-line is slightly offset ahead of the crankshaft to reduce piston side-thrust and wear.Skewed Head: The light-alloy cylinder head is rotated 21° to improve cooling and provide easier access to the carburetor.Internal Pushrods: Pushrods are enclosed within the barrel casting rather than in external tubes. AJS & Matchless Owners Club +1Performance VariantsModel 14 (Standard): The base touring model.Model